projects/linux·blob da89fb16 · refs

67 lines · 2.2 KiB

1#ifndef _LINUX_MIGRATE_H
2#define _LINUX_MIGRATE_H
3
4#include <linux/mm.h>
5#include <linux/mempolicy.h>
6#include <linux/migrate_mode.h>
7
8typedef struct page *new_page_t(struct page *, unsigned long private, int **);
9
10#ifdef CONFIG_MIGRATION
11
12extern void putback_lru_pages(struct list_head *l);
13extern int migrate_page(struct address_space *,
14 struct page *, struct page *, enum migrate_mode);
15extern int migrate_pages(struct list_head *l, new_page_t x,
16 unsigned long private, bool offlining,
17 enum migrate_mode mode);
18extern int migrate_huge_pages(struct list_head *l, new_page_t x,
19 unsigned long private, bool offlining,
20 enum migrate_mode mode);
21
22extern int fail_migrate_page(struct address_space *,
23 struct page *, struct page *);
24
25extern int migrate_prep(void);
26extern int migrate_prep_local(void);
27extern int migrate_vmas(struct mm_struct *mm,
28 const nodemask_t *from, const nodemask_t *to,
29 unsigned long flags);
30extern void migrate_page_copy(struct page *newpage, struct page *page);
31extern int migrate_huge_page_move_mapping(struct address_space *mapping,
32 struct page *newpage, struct page *page);
33#else
34
35static inline void putback_lru_pages(struct list_head *l) {}
36static inline int migrate_pages(struct list_head *l, new_page_t x,
37 unsigned long private, bool offlining,
38 enum migrate_mode mode) { return -ENOSYS; }
39static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
40 unsigned long private, bool offlining,
41 enum migrate_mode mode) { return -ENOSYS; }
42
43static inline int migrate_prep(void) { return -ENOSYS; }
44static inline int migrate_prep_local(void) { return -ENOSYS; }
45
46static inline int migrate_vmas(struct mm_struct *mm,
47 const nodemask_t *from, const nodemask_t *to,
48 unsigned long flags)
49{
50 return -ENOSYS;
51}
52
53static inline void migrate_page_copy(struct page *newpage,
54 struct page *page) {}
55
56static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
57 struct page *newpage, struct page *page)
58{
59 return -ENOSYS;
60}
61
62/* Possible settings for the migrate_page() method in address_operations */
63#define migrate_page NULL
64#define fail_migrate_page NULL
65
66#endif /* CONFIG_MIGRATION */
67#endif /* _LINUX_MIGRATE_H */